Telephone call transmitter



Feb. ze, 1946. T. L. DOWEY A' '172,395,539

TELEPHONE CALL TRANSMITTER Filed Dec. si, 194s 4 Sheets-Sheet 1 04m G, 7M

AT TURA/Ey Feb. 26, 1946. f L DOWEY 2,395,539

TELEPHONE CALL TRANSMITTER Filed Dec. 3l, 1945 4 Sheets-Sheet 2 FIG. 2;

@am 1M ATroRNEv Feb. 26, 1946. -T L, DowEY 2,395,539

TELEPHONE CALL TRANSMITTERv Filed Dec. s1, 1945 '4 sheets-sheet 5 /N VEN TOR eza M ATTORNEY By 7'.VL.DOWEV Feb 26, 1946 T. L DowEY 2,395,539

TELEPHONE CALL TRANSMITTER Filed Dec. 3l, 1943 4 Sheets-Sheet 4 87 l l f ATTORNEY Patented Feb. 26, 1946 TELEPHONE CALL 'TRANSMITTER` rlhomas L. Dewey, Summit,-N.` J assgnor to Bell Telephone Laboratories,` Incorporated, Newl York, N. Y., a corporation of'NeW York Application December 31, 1943, Serial No. 516,430

This invention relates to, telephone call transmitters of the repertory type.

The object of this invention is the `provision of a. call transmitter. ofthe type above referred to whichwill besimple in construction, convenient. in use, positive in operation and in which codeelements, are movedin position for setting acall by the' operationfof a handle lever or by the operation ofkey members independently of the repertory setting mechanism, .with motor means for moving an` alternating current generator transverse of the codeelements for transmitting signals `.corresponding to the setting of these elements.

Inthe drawings:

Fig..1.is aleft side elevation view shown with the casinghousing the transmissionmechanism in. vertical section, the operating parts being shown; in normal` non-operated position, and showing a number of these parts with portions broken away;

Eig. 2 isa topA view shownwith thecasing in horizontal section seen on line 2-2 of l.;

Fig. 3 is airontelevation view seen on line 3..-3` of, Fig. 1 with the casing and a number of operating parts in vertical section;

Fig. 4.1 is apartialviewin section taken on line 4 4. offFig, 1`;.

Fig 5 is aview of thecodeelements andmounting shaft shown partly-in section;`

tions I6` bestseen in-'Figs.. 13' and 5' extending in engageablerelation with code elements inthe form of metallic strips` I1! mounted on a shaft I8 having peripherally longitudinally disposed grooves I9 best seen in Fig. 5 `provided .for readily locating the code strip I] in equally spaced relation onthe shaft` I8 where they are co1lec= tively held radially in assembled relation to each other between disc members 2'0 and.2I, disc member 2-0 being keyed on shaft I8 while disc member.2I is pressed against the code strip ends by a nut` 23 .engaging the screw-threaded. portion 24.0fshatt I8 as shown in Fig. 5`

The shaft IB lis journaled at both ends in. arcuated..mounting elements 26.and 21 formed with vertically disposed arms al and a2 pivoted at their lower. ends, oneof. the ends of link mem bers.28andf29 formed with a bar 3IJ`while the other, ends of links 28 and 29 arepivoted on a shaft `3l journaled in upright supporting plates II and.l2.

The arcuated mounting elements 26 and 21 are held in spaced relation at av point adjacent ftheupper disposed end portions of arms Fig. 6. is a partial View showing the driving mechanism for the alternating current' generator, `the casingbeing shown with portions `broken away and the code wheels in normal non-operated position;

Eig.A 7 is a. partial viewshowing the `key-settingemechanismior the code wheels innormal non-operated position; and

Fig. 8 is an assembly viewshownin perspective,

the code wheels being shown in the operated posi tion by the operation of the manually operable keys.

Irl-theV call transmitter' of this invention a base I`Ily isv provided for securing as by a numberof screws I3' the uprightsupporting plates II and I2 andf on theseplatesisfjournaled a" shaft I4 on which .arezmounted `for free rotation thereon afpluralityof code wheels WI, W2, W3, W4, W5, W6- and W1 having hubportionsY extending;` to one side thereof for securelymountingfthe Vpinions PI, P2, P3, B4,.P5 l?iV and P1 best seen in Figsl 2` and 3 engagedby respectivegear. sectors SMS2., S3, S4,.S5.S6' and S'I mountedor free;A pivotal... movement. i on.. a shaft I5;` These gear.A sectors are formed' with similar. arm por'- al andazlby aspacer bar 32 secured thereto as by a. number of screws 33, .while aY second pair. of.'` links 34 and.3,5 formed at the ends of atbar. BBI; are pivoted. at one of their ends on shoulder serews33. and 31 carriedby the arcuf ated mounting elements 26 and 21| andtheir opposite ends on a shaft l 38 journaled` in up.- right supporting plates II and I2, while a retractile spring 39. having one end hooked to a stud.40. laterally extending` from the arm a2 and itsother end` connectedto a. pin 4I laterally eX- tending:V from. the.. upright supporting, plate I2 serves .tol yieldably hold the. arcuated mounting elements 26. and 2J in the. non-operated position asshowninFig .1 as :defined bythe engagement of arms al and a2 with similar. stop lugs, 42 formedA andlaterally extending fromthe., upright supporting plates I I` and I2 .as shown `inflige. 1,

2.and. 3.

On shaft.. I8` is keyed a; gear. 43meshing. with anarcuated gear. rack. mounted. for sliding movement. on` thearcuated mounting element., 26 andguided. in its movement thereon by roller members -45 and-ii, Figs. 1, 4 and5 :running into a guiding slot 4'! in the arcuated mounting ele: ment 26.. A handle lever 48 is provided at its lower endwith aslot 49iengaging the shaft 3| while the opposite end'of this leverI is tted for sliding movement inN a guiding element 50 se'- cured` as by, a number" of screws 5Ito theAV gear sector Mbut held' in the retractedor non-opere ated position as shown in Figs. 1, 4 and 8 by an angle lever 53 itself under the tension of a spring 52 engaging the horizontally disposed arm of this angle lever. The handle lever 48, as shown in Figs. 1,4 and 8, extends through a slot 54 in a casing 55 serving for housing the transmitter mechanism. Casing 55, in addition, is provided with a card frame 51 secured as by a number of similar screws 58 onto the inwardly bent portions 59 and 68 of upright supporting plates Il and I2. Card frame 51 is provided with inwardly bent portions 6I and 82 for holding the cards in the forms of strips Cd on which are printed subscribers names and shown in Fig. 8, the cards Cd being of such width as to correspond to the movement of a pointer 83 carried by the handle lever 48 and the movement of shaft I8 and that of the code strips `I1 carried thereby passing in registry with the arms I of gear sectors SI, S2, S3, etc., sothat the pivotal movement Vof handle lever 48 from the position shown in Figs. 1 and 8 to the position at the opposite end of guiding slot 64 is eiective through the operation of gear sector 44 to rotate the gear 43 Vand thereby the shaft I8 for successively placing the code strips I1 in registry with the cards Cd representing the telephone call designations of the subscribers names which appear in registryor in alignment with the pointer 63.

The longitudinal movement of handle 43 following its movement as to place the pointer 63 in registry with anyV one of the cards Cd and therebythe corresponding code strip I1 in registry with the arms I6 of gear sectors SI, S2, S3,

etc., is effective ,to impart a pivotal movement to angle lever 53 against the tension of its resupporting mounting elements 26 and 21 to cause the springs 65 to engage their respective arms I8 formed with gear sectors SI, S2, S3, etc. for rotating the latter and the code wheels WI, W2, W3, etc. to position for placing a portion of each of these Vcode discs which represent the nurn-A ber of the subscribers name selected in position to be engaged by the vibrative elements VI, V2, V3, V4 and V5 of an alternating current generator best seen in Figs. 1, 3, 6 and '1 upon the movement of the latter transverse of the code elements by a mechanism which will b'e hereinafter described in detail. Y

The alternating current generator consists of the position shown in Fig. 3 to a position at the opposite end of worm 10 due to the pivotal move- Y ment of angle levers 13 and 14 away from the under-surface of mounting 68 as effected by the engagement of these angle levers with parallelly disposed cam bars 11 and 18 formed with the base I8, while the return movement of the generator and the consequent pivotal movement of the angle levers 13 and 14 in the direction indicated fby the arrow in Fig. 3 is effective to move the generator in an upward direction against the tension of retractile springs 1I and 12 so as to place the reeds VI, V2, V3, etc., in position` to successively engage the code wheels WI, W2, W3, etc.

The worm 10 is rotated in one direction by the movement of a handle lever 19 tted on the square portion of a shaft journaled at one end Y in the upright supporting plate I2 and its other end in an upright support 8| secured at its lower end to the base I 0 and on shaft 80 as shown 4in Figs, 2, 3'V and 6 is secured a gear sector 82 and the inner convolution of a spiral motor spring 83, the latter having its outer convolution hooked to a pin 84 laterally extending from the upright support 8|, the motor spring 83 being normally tensioned as to hold the gear sector 82 against a stop in the form of lug 85 and the handle levier 19 inthe position shown in Figs. 1, 3, 6 and 8. Y

Gear sector 82 meshes with a pinion 86 mounted for rotation as a unit with a gear 81 keyed on a shaft 88 while gear 81 meshes with the pinion 89 keyed on one end of worm 10 so that the angular movement of handle lever 19 from stop` 85 to stop 9D is eective to rotate the shaft 80 and thereby the gear sector 82 While tensioningY the Y motor spring 83 and rotating the Worm 10 for moving the generator Vtransverse of theV code wheels WI, W2, W3, etc., to starting positions as shown in dotted lines in Fig. 3. The release rof handle lever 19 by the operatorand the consequent return of gear sector 82 to normal unoperated position by the tension of motor spring 83 is eifective to rotate the worm 10 `infthe opposite direction for returning the generator transverse of the code elements and thereby engagingv the vibrative elements VI, V2, V3, etc., with the code wheels set by the operation of the code strips I1,

` indicated by dials as 94 carried by the code wheels a permanent 'magnet 65, best seen in Fig. 3, a coil B1, a mounting 68 to which the vibrative elements VI, V2, V3, V4 and V5 are secured to project in an opening in the :core of coil 61 for vibration the mounting 68 in position wherein theV reeds VI, V2, V3, etc. carried thereby are ineffective to enga-ge the code wheels WI, W2, W3,

etc., upon vthe movement of the generator Afrom WI,VW2, W3, etc., appearing through a window 95 in the casing 55 as shown in Figs, 7 and 8.

In a typical example of operation in the transmittingV of a call designation by the repertory mechanism, the movement of handle lever 48 Y from normal position to the position shown in dotted lines in'Fig. 8for placing the pointer 163 in registry with the subscribers name, John Doe for example, is effective to actuate the arcuated gear rack 44 for rotating the gear 43 and thereby the shaft I8 for positioning the code strip I1 which represents the call designation of the subscriber selected, the gear 44 being held in that position' as shown in Fig. 1 by a spring Nosecured to the arcuated gear rack and engaging inthe-directionindicated by the arrovfin Fig." 1

simultaneously with aL corresponding downward movement of1 arcuated supporting elements2 26 andi21isupportingthe-shaft |81 so as to engage th'eespriifigs'ldvvith their corresponding arms I6 of@ gearsectorssill, S2; etc., formoving the latter againsttheecode'portionsl or `indentations of" the code strip=` IlT* selectedY by theU movement-I `of r the gear rack 44, thus rotating the Wheels WI?, W2, W3,C etes, for positioning their code portions in engageable relation with the vibrative elements VI, V2, etc., of the generator, the handle lever 48 being returned to normal non-operated position by the tension of retractile spring 52 and the arcuated supporting elements 2B and 21 by the tension of spring 39.

The manual operation of handle lever 19 and that of gear sector 82 is effective to tension the motor spring 83 and to rotate the pinion and gear units 86 and 81 and the pinion 89 for rotating the Worm 1B for moving the alternating current generator from normal to the position shown in dotted lines in Fig, 3 at the opposite end of Worm 10, the vibrative elements VI, V2, V3, V4 and V5 being in position ineffective to engage the cde elements WI, W2, W3, etc. The return of gear sector 82 to normal unoperated position under the tension of motor spring 83 and the consequent operaton of Worm in the opposite direction under control of governor CG, the angle levers 13 and 14 engage the cam bars 11 and 18 to move the generator upwardly to cause the vibrative reeds VI, V2,V3, etc., to engage the code portion of Wheels WI, W2, W3, etc., for transmitting the call designation represented by the selected card in registry with the pointer 63 and the transmitter is now ready for a successive call setting and transmitting operation.

In a typical example in the setting and transmitting of a call designation which does not appear on one of the cards of the repertory mechanism as call designation CH-3-1000, for exam- -ple, with the handle lever 48 in normal nonoperated position as shown in Figs. 1 and 8 the shaft I8 is positioned to place the blank space in juxtaposition to the arms I6 carried by the gear sectors Sl, S2, S3, etc., for permitting the pivotal movement of these sectors and thereby the rotation of the code wheels WI, W2, W3', etc., by the operation of the key members KI, K2, K3, etc., for setting the code portion of these Wheels in registry with the vibrative elements Vl, V2, V3, etc., of the generator, which position is indicated by the dial 94 carried -by these wheels, the transmitting of signals corresponding to the call designation thus set being effected by the manual operation of handle lever 19 for actuating the worm 10 in the manner as above described in connection with the transmitting of signals by the repertory mechanism.

What is claimed is:

1. In a call transmitter, a rotatable shaft, code elements mounted radially on said shaft and in movementthereof, anothen shaft; codewheels mountedffor-'rotaton---onfsaid' shaft, each offsaid tvlieels'- havingE a gear, a'- third shaft;4 gear` sectors mounted: forY free: rotation orl-l said'` third-- shaft andlfiaving arms extendingN in engageablef relation` with the seleetedcodelelementfon saidfslrait, a-l'ever'mechanism actnatedllcfiyT thelmovementriof said-manually operableleverI member forfengage ing said selected code element with said arms to cause the rotation of said code wheels, angular movements corresponding to said selected code element for setting a call.

parallel relation thereto, a plurality of code Wheels, means manually operable in one direction for rotating said shaft to move said elements for positioning one of the latter in selected posi- 3. In a call transmitter, a pair of upright supports, a pair of arcuated supporting elements pivoted on said supports, a shaft rotatably mounted on said elements and having a gear keyed at one end thereof, a plurality of code elements mounted on said shaft, a gear sector mounted for sliding movement on one of said supporting elements and engaging the gear on said shaft, a handle lever for actuating said gear sector for rotating said shaft for positioning one of said code elements in selected position, a plurality of code wheels, and driving means for said code Wheels actuated by the pivotal movement of said mounting elements eiected by the movement of said handle lever to cause the selected code element to engage said driving means collectively for actuating said code Wheels for setting a call. l

4. In a call transmitter, a pair of uprightvsupports, a plurality of code Wheels, a supporting shaft for said Wheels journaled on said upright supports, a pair of movable supporting members mounted on said supports, a shaft journaled at both ends on said members, code elements carried by the last-mentioned shaft in parallel relation thereto, manually operable means movable in one direction for selecting one of said code elements and in the other direction actuating said supporting members, and resilient means actuated by the movement of said members for actuating means to cause the rotation of said code wheels according to the selected code elements for setting the call.

5. In a call transmitter, a plurality of sets of independently operable code elements, manually operable means movable in one direction for selecting one of said elements in one of said sets, and a gearing mechanism actuated by the movement of said manually operable means in another direction for actuating all the elements of the other set according to the selected element for setting a call.

6. In a call transmitter, a plurality of sets of independently operable code elements, a manually operable lever member movable in one direction for selecting one of said elements in one of said sets, means operated by said manually op erable means in another direction for operating all of said elements in the other of said sets according to said selected element in the other set, an alternating current generator, manually operable means, a motor spring tensioned by the tien, L andi driving-'f' means forisaid code; AWheels' operation of said manually operable means,` and a gearing 'mechanism o peratedbythe tension of said motor springs for moving said generator in a direction transverse of the last-mentioned code elements for transmitting the call.

7. In a call transmitter, a pair 0f upright supports,` a pair of supporting members pivoted on said supports, a shaft journaled in said supporting members, a plurality of code elements disposed in spaced radial position to each other on said shaft,v another shaft journaled on said upright supports, a plurality of codeV elements mounted for free rotation of the last-mentioned shaft, a manually operable lever member pivoted on said supporting members, means actuated. by the pivotal movement of said lever member for rotating the first-mentioned shaft for positioning` one of said radial code elements in selected position, a card holder mounted on said upright supports havingV cards printed with subscribers l names represented by said radial code'elements, and means carried by said manually operable lever member cooperating with said cards for indi-` cating the selected code element, means operatively connecting said selected elements with said code wheels, said manually operable lever member being movable longitudinally for actuating said connecting means to cause the collective setting of said code wheels according to said selected code element-for setting a call, dials carried by said code wheels for indicating the operation thereof, an alternating current generator, a driving mechanism, and motor means for actuating said mechanism for moving said generatorinra direction transverse of said code wheels for transmitting the call.

THOMAS L. 

